In episode 2 of Quantum Consciousness, Justin Riddle presents Roger Penrose's three world model: Physical, Mental, and Platonic. The three world model proposes a domain for the observations and measurements made regarding the external world (Physical), a domain for the private and personal subjective experience that constitutes the narrative flow of your mind (Mental), and a transpersonal domain for logic and mathematical truth akin to Plato's world of forms (Platonic). While it has been said that "all models are wrong, but some are useful," I have found the three world model to be a profound source of insight.